Low pH hydrothermal synthesis and properties of lanthanide-organic frameworks with (410,65)(49,66) topology constructed from Ln-Hbptc building blocks

Abstract

Two novel lanthanide-organic frameworks (LnOFs) with (4(10),6(5))(4(9),6(6)) topology, [Ln(Hbptc)(H(2)O)](n) (Ln = Eu(1), Gd(2); H(4)bptc = 3,3',4,4'-biphenyltetracarboxylic acid) were synthesized via the hydrothermal in situ reaction between lanthanide salts and 3,3',4,4'-biphenyltetracarboxylic dianhydride (bpta) under low pH conditions. In complexes 1 and 2, homohelix bundles with opposite chirality are assembled alternately and result in pillar-like 3D extended networks incorporated with coordinated water molecules, which show high thermal stability. The luminescence properties are illustrated by the Eu(III) complex (1) and its Gd-doped compound, which are intensive red emitters. The magnetic properties of complexes 1 and 2 are also investigated.

Synthesis, structure and luminescence of a new series of rigid–flexible lanthanide coordination polymers constructed from benzene sulfonic acid and glutaric acid

“…The nine oxygen atoms coordinate to Eu(III) ion to form a slightly distorted tricapped trigonal prism EuO 9 polyhedron configuration (Fig. 1b), in which two oxygen atoms are from two different BSA ligands (O1, O3#2), five are from four different glutarate acid ligands (O4, O5, O5#2, O6, and O7#1) and two are from two water molecules (O1W, O2W) [28,43,44]. The coordination mode of glutarate in the complex is shown in Fig.…”

Fluorescence Properties Change of Lanthanide Coordination Polymers Dispersed in Mesoporous SBA-15 by Energy Transition Process

“…Consequently, a variety of 4f and 4f-3d coordination polymers with interesting architectures and topologies have been successfully synthesized [19][20][21][22][23][24]. Lanthanides, with high and variable coordination numbers (6 B CN B 12) and flexible coordination environments, have led to a limited success in the design of molecular architectures with predetermined structures [25][26][27]. In the field of coordination polymers constructed by carboxylate ligands, much work is focused on lanthanide and transition metal coordination polymers constructed by multi-carboxylate ligands, such as benzene-1,2,4,5-tetracarboxylate, benzene-1,3,5-tricarboxylate, pyridine-2,3(5)-dicarboxylate, pyridine-2,6-dicarboxylate [28][29][30][31][32][33][34][35][36][37].…”

Synthesis, characterization and luminescent property of a novel zinc(II) 1,2,3,4-tetra(4-pyridyl)thiophene metal–organic framework

“…The most feasible strategy used to design and construct MOFs is to select suitable polyfunctional ligands that enable the control on the structural motifs [10][11][12]. Ligand 1,2,3,4-tetra (4-pyridyl)thiophene (TPT, Scheme 1) is a rigid symmetric compound, which has four potential coordinating N-donor atoms.…”

“…Therein, some weak interactions, such as hydrogen bonding and p-p stacking interactions, greatly affect the structures of MOFs [5,6]. Moreover, they may link low-dimensional entities into high-dimensional supramolecular networks [7][8][9].The most feasible strategy used to design and construct MOFs is to select suitable polyfunctional ligands that enable the control on the structural motifs [10][11][12]. Ligand 1,2,3,4-tetra (4-pyridyl)thiophene (TPT, Scheme 1) is a rigid symmetric compound, which has four potential coordinating N-donor atoms.…”